WO2020159252A1 - 트랜스포머 - Google Patents

트랜스포머 Download PDF

Info

Publication number
WO2020159252A1
WO2020159252A1 PCT/KR2020/001422 KR2020001422W WO2020159252A1 WO 2020159252 A1 WO2020159252 A1 WO 2020159252A1 KR 2020001422 W KR2020001422 W KR 2020001422W WO 2020159252 A1 WO2020159252 A1 WO 2020159252A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductive plate
transformer
core
bobbin
midfoot
Prior art date
Application number
PCT/KR2020/001422
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
남택훈
윤석
김유선
배석
임영석
Original Assignee
엘지이노텍(주)
전남대학교산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020190011882A external-priority patent/KR20200094422A/ko
Priority claimed from KR1020190011883A external-priority patent/KR20200094423A/ko
Application filed by 엘지이노텍(주), 전남대학교산학협력단 filed Critical 엘지이노텍(주)
Priority to CN202080011857.7A priority Critical patent/CN113439315A/zh
Priority to EP20747632.6A priority patent/EP3920199A4/de
Priority to US17/310,383 priority patent/US20220093315A1/en
Publication of WO2020159252A1 publication Critical patent/WO2020159252A1/ko

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2866—Combination of wires and sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps

Definitions

  • the present invention relates to a transformer including a secondary coil portion on which a conductive plate is stacked.
  • Various coil components such as transformers and line filters, are mounted on the power supply of electronic devices.
  • Transformers may be included in electronic devices for various purposes. For example, a transformer can be used to perform an energy transfer function that transfers energy from one circuit to another. Also, the transformer may be used to perform a step-up or step-down function that changes the magnitude of the voltage. In addition, since only inductive coupling (coupling) is performed between the primary and secondary windings, a transformer having a characteristic in which no DC path is directly formed may be used for DC blocking and AC passage or isolation between two circuits. .
  • the transformer includes a core that serves as a passage for magnetic flux, and an air gap or a gap is disposed in the midfoot to improve the performance of the core. This will be described with reference to FIG. 1. 1. 1 is a view for explaining a gap of a general core.
  • FIG. 1 a core portion C in which general symmetric E-type cores C1 and C2 are coupled is illustrated.
  • the outer groups of each of the two E-type cores C1 and C2 are in contact with each other when engaged, but each of the middle legs CL1 and CL2 are spaced apart from each other to have a predetermined distance, that is, a gap G in the vertical direction. If there is a gap G in the middle of the core portion C, the magnetic properties of the magnetic element using the core portion C are improved compared to the case where the gap G is not.
  • the magnetic energy is concentrated in the periphery of the gap G compared to the rest, so the current density increases in the coil adjacent to the gap G, thereby improving the performance of the magnetic element. Reduces it. Therefore, in order to reduce the side effects due to the bias of magnetic energy while using the excellent properties due to the gap G being provided, a method of increasing the number of parallel stacks of coils adjacent to the gap G is used in a general magnetic element. However, this method complicates the configuration of the coil, causes an increase in weight and device size, and has a problem in defect rate management due to a complicated assembly process.
  • the present invention is designed to solve the problems of the prior art described above, and is to provide a transformer with more efficiency.
  • the present invention is to provide a transformer having a secondary side coil portion having a structure capable of alleviating the effect of current density due to a specific portion having a high energy density of the core portion.
  • the present invention is to provide a transformer having a secondary side coil portion having a structure capable of alleviating the effect of current density due to a gap in the core portion.
  • the transformer of the present invention according to an embodiment of the present invention, the conductive plate constituting the gap of the core portion and the secondary coil portion have a side shape arranged spaced apart from each other in the vertical direction.
  • the current density problem due to the gap is structurally compensated.
  • the transformer includes a bobbin; A core portion disposed outside the bobbin and including an upper core having a first midfoot and a lower core having a second midfoot, having a gap between the first midfoot and the second midfoot; And it includes a plurality of conductive plates stacked in the thickness direction, each of the plurality of conductive plates may have a side shape arranged spaced apart from each other in the vertical direction with the gap.
  • the transformer includes a bobbin; A core portion disposed outside the bobbin and including an upper core having a first midfoot and a lower core having a second midfoot, having a gap between the first midfoot and the second midfoot; And a plurality of conductive plates that are inserted into the bobbin and are respectively spaced apart from each other in the vertical direction and constitute a lower coil portion, and the middle coil portion includes a first middle coil portion and a second middle nose. It includes a part, and in the vertical direction, the gap may be disposed between the first middle coil part and the second middle coil part.
  • first middle coil part and the second middle coil part may have a side shape spaced apart from each other in the vertical direction so as not to overlap the gap in the horizontal direction.
  • the bobbin has a middle accommodating part accommodating the middle coil part, and the middle accommodating part includes: a first accommodating hole accommodating the first middle coil part; A second accommodating hole accommodating the second middle coil part; And a partition wall disposed between the first receiving hole and the second receiving hole in a vertical direction, and at least partially overlapping the gap in the horizontal direction.
  • the size of the gap in the vertical direction may be smaller than a vertical separation distance between the first middle coil part and the second middle coil part.
  • each of the upper coil part, the first middle coil part, the second middle coil part, and the lower coil part may include a first type conductive plate and a second type conductive plate stacked in the thickness direction.
  • first type conductive plate and the second type conductive plate may have a plane shape that is symmetrical to each other.
  • an extension direction of a through hole disposed at the signal end of each of the first type conductive plate and the second type conductive plate is disposed at a ground end of each of the first type conductive plate and the second type conductive plate. It is possible to achieve a predetermined angle with the extending direction of the through hole.
  • the predetermined angle may include an obtuse angle.
  • the conductive plate disposed on the uppermost layer in the vertical direction and the conductive plate disposed on the lower layer may have a greater thickness than the remaining conductive plates.
  • the transformer of the present invention according to another embodiment of the present invention, the conductive plate adjacent to the portion of the magnetic force energy density of the core portion of the conductive plate constituting the secondary coil portion is relatively high By thickening the thickness of the remaining conductive plate, the current density problem due to the bias of magnetic force energy is structurally compensated.
  • the transformer includes: a bobbin; A core portion disposed outside the bobbin and including an upper core having a first midfoot and a lower core having a second midfoot, having a gap between the first midfoot and the second midfoot; And a plurality of conductive plates stacked in the vertical direction, wherein at least one conductive plate adjacent to the gap in the vertical direction among the plurality of conductive plates may have a greater thickness than the remaining conductive plates.
  • the transformer includes: a bobbin; A core portion disposed outside the bobbin and including an upper core having a first midfoot and a lower core having a second midfoot, having a gap between the first midfoot and the second midfoot; And a plurality of conductive plates which are inserted into the bobbin and are respectively spaced apart from each other in the vertical direction and constitute a lower coil portion, and at least one conductive plate adjacent to the gap in the middle coil portion. May have a larger thickness than the remaining conductive plates.
  • the uppermost conductive plate of the upper coil portion and the lowermost conductive plate of the lower coil portion may have a greater thickness than the remaining conductive plates of the upper coil portion and the lower coil portion.
  • At least one conductive plate adjacent to the gap in the middle coil portion, each of the uppermost conductive plate of the upper coil portion and the lowermost conductive plate of the lower coil portion, has a remaining conductive plate among the plurality of conductive plates It may have a second thickness that is thicker than the first thickness.
  • the plurality of conductive plates may have a first planar shape, but have a first-first type conductive plate having a first thickness and a first thickness having a first planar shape but a second thickness that is thicker than the first thickness.
  • Any one of the -2 type conductive plate, a 2-1 type conductive plate having a second planar shape but having the first thickness, and a 2-2 type conductive plate having the second planar shape but having the second thickness Any one of them may be formed by being stacked alternately in the vertical direction.
  • first plane shape and the second plane shape may be symmetrical to each other.
  • an extension direction of a through hole disposed at the signal end of each of the conductive plate having the first planar shape and the conductive plate having the second planar shape includes the conductive plate having the first planar shape and the second flat surface. It is possible to achieve a predetermined angle with the extending direction of the through hole disposed at the ground end of each conductive plate having a shape.
  • the predetermined angle may include an obtuse angle.
  • the effect on the current density is alleviated due to the difference in relative thickness of the conductive plate adjacent to the portion.
  • 1 is a view for explaining a gap of a general core.
  • FIG. 2 is an external perspective view of a transformer according to an embodiment.
  • FIG. 3 is an exploded perspective view of a transformer according to an embodiment.
  • FIG. 4 shows the shape of a bobbin according to an embodiment.
  • FIG. 5 is an external perspective view of a lower core according to embodiments.
  • FIG. 6 shows a planar shape of two types of conductive plates according to an embodiment.
  • FIG. 7 is a side view for explaining an arrangement form between a gap and a conductive plate according to an embodiment.
  • FIG. 8 is a side view showing an example of a transformer structure according to another aspect of an embodiment.
  • FIG. 9A shows the current density in the secondary coil portion of the transformer shown in FIG. 8
  • FIG. 9B shows the current density in the secondary coil portion of the transformer according to the comparative example.
  • FIG. 10 is an external perspective view of a transformer according to another embodiment.
  • FIG. 11 is an exploded perspective view of a transformer according to another embodiment.
  • FIG. 12 shows the shape of a bobbin according to another embodiment.
  • FIG. 13 is a side view for explaining the arrangement form between the core portion and the conductive plate according to another embodiment.
  • FIG. 14 shows the current density in the secondary coil portion of the transformer shown in FIG. 13.
  • 15 is a plan view showing an example of a transformer structure according to another embodiment.
  • 16 is a perspective view showing an example of a configuration of a bobbin and a secondary coil unit according to another embodiment.
  • top (top) or bottom (bottom) in the case of being formed in “top (top) or bottom (bottom)", “before (front) or after (back)" of each component, “top (top) or bottom “Bottom” and “before (before) or after (behind)” include both two components in direct contact with each other or one or more other components formed between two components.
  • first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term.
  • a component is described as being “connected”, “coupled” or “connected” to another component, the component may be directly connected to or connected to the other component, but another component between each component It should be understood that elements may be “connected”, “coupled” or “connected”.
  • Figure 2 shows an external perspective view of the transformer according to an embodiment
  • Figure 3 shows an exploded perspective view of the transformer according to an embodiment, respectively.
  • the transformer 100A includes a bobbin 110A, a plurality of conductive plates 120 inserted into the bobbin 110A, and a plurality of conductive plates 120 ) By electrically connecting the plurality of conductive plates 120 together with the plurality of fastening parts 130 and the bobbin 110 to form at least a part of the secondary coil part integrally coupled to the core part ( 140).
  • the transformer 100 is wound on the bobbin 110A, and may further include a conductive wire constituting the primary coil part, but illustration in the drawings of the specification is omitted.
  • the primary coil part (not shown) may be a rigid conductor metal, for example, multiple windings in which copper conductive wires are wound several times or may be plate-shaped.
  • the secondary coil units 120 and 130 may transform and output a power signal supplied from the first coil unit (not shown).
  • a total of eight conductive plates may be disposed in a stacked form in a thickness direction (eg, z-axis direction). Each conductive plate may correspond to 1 turn in the secondary coil portion. However, this is exemplary and more or less conductive plates may be applied.
  • each of the plurality of conductive plates 120 may be inserted into the bobbin 110A in a direction parallel to the x-axis.
  • Each of the plurality of conductive plates 120 may be electrically insulated from each other through an insulating material except for an electrical connection through the fastening portion 130.
  • an insulating film may be disposed between conductive plates adjacent to each other among the plurality of conductive plates to be electrically insulated from each other.
  • the insulating film may include components such as ketone and polyimide, but is not limited thereto.
  • the conductive plate 120 may include an upper coil part 120T, a first middle coil part 120M1, a second middle coil part 120M2, and a lower coil part 120B, and each coil part 120T, 120M1 , 120M2, 120B) may be spaced apart from each other in the thickness direction.
  • each of the plurality of conductive plates 120 may include a conductive metal, for example, copper, but is not limited thereto.
  • the plurality of conductive plates may include aluminum.
  • the thickness of the conductive plate may be about 60% thicker than copper, but is not necessarily limited to this thickness ratio.
  • conductive wires (not shown) constituting the primary coil part, a plurality of conductive plates 120 constituting the secondary coil part, and the core parts 140 are insulated from each other, respectively 120 and 140 ) May have a shape suitable for accommodating or fixing at least a portion.
  • the bobbin 110A may have a through hole TH having a planar shape corresponding to the midfoot shape so that the midfoot of the core portion 140 can penetrate.
  • the bobbin 110A may include an insulating material, for example, a resin material, and may be produced in various molding methods.
  • the bobbin 110A according to embodiments of the present invention may have an opening exposing a portion of the upper surface of the uppermost conductive plate in the thickness direction and a portion of the lower surface of the lowermost conductive plate in the thickness direction among the plurality of conductive plates 120. A more specific shape of the bobbin 110A will be described later with reference to FIG. 4.
  • the fastening portion 130 passes through one end of each of the conductive plates 120 in the form of a plurality of metal bars in the thickness direction (eg, Z-axis direction), and each of the conductive plates 120 is soldered. Can be fixed. Of course, depending on the embodiment, the metal bar may be replaced with other fastening members such as bolts, nuts, and washers.
  • the core portion 140 having the characteristics of a magnetic circuit may serve as a passage for magnetic flux.
  • the core portion may include an upper core 141 coupled from the upper side and a lower core 142 coupled from the lower side.
  • the two cores 141 and 142 may be symmetrical to each other and may be asymmetrical.
  • the core portion 140 may include a magnetic material, for example, iron or ferrite, but is not limited thereto. The specific shape of the core portion 140 will be described later with reference to FIG. 5.
  • FIG. 4 shows the shape of the bobbin 110A according to one embodiment.
  • the bobbin 110A includes an upper accommodating part 111A, a middle accommodating part 113A, a lower accommodating part 115A, an upper accommodating part 111A and a middle accommodating part.
  • An upper connecting portion 112 connecting the 113A and a lower connecting portion 114 connecting the middle receiving portion 113A and the lower receiving portion 115A may be included.
  • each of the receiving portions (111A, 113A, 115A) has a "U" shape or a track-shaped flat shape with one side semi-cut, each receiving portion (111A, 113A, 115A) and the two connecting portions (112, 114) ) May be aligned around the through hole TH in a vertical direction on a plane.
  • the inner surface of each connection portion 112 and 114 may define a sidewall of the through hole TH.
  • the through hole TH may have a track-like planar shape, but this is exemplary, and it is sufficient to have a shape corresponding to the planar shape of the midfoot of the core portion 140 to be described later.
  • Each receiving portion (111A, 113A, 115A) has a receiving hole (RH1, RH2, RH3, RH4) for accommodating the conductive plate 120, in common conductive to the other side opposite to one side having a semi-circular shape on the XY plane
  • the plate 120 has an opening through which it can be inserted.
  • the upper accommodating part 111A has an upper accommodating hole RH1 in which the upper coil part 120T is accommodated
  • the lower accommodating part 115A is a lower abrasive hole RH4 in which the lower coil part 120B is accommodated.
  • the middle accommodation portion 113A has a first middle accommodation hole RH2 in which the first middle coil portion 120M1 is accommodated and a second middle accommodation hole RH3 in which the second middle coil portion 120M2 is accommodated.
  • a partition wall 116 having a predetermined thickness T is disposed between the first middle receiving hole RH3 and the second middle receiving hole RH4. Therefore, the first middle coil part 120M1 and the second middle coil part 120M2 are spaced apart at least by the thickness T of the partition wall 116 in the vertical direction. Therefore, the first middle receiving hole RH3 and the second middle receiving hole RH4 may be separated by the partition wall 116.
  • the position of the partition wall 116 in the vertical direction when viewed from the side, at least a portion of the gap G of the core portion 140 may overlap in the horizontal direction.
  • the upper receiving portion (111A) and the lower receiving portion (115A) has a symmetrical shape up and down in the thickness direction (for example, Z-axis direction), the upper receiving portion (111A) is open to the upper side, the lower receiving portion ( 111C) opens downward. Therefore, at least a portion of the upper coil portion 121 accommodated in the upper receiving portion 111A is exposed in an upward direction of the conductive plate positioned at the uppermost end, and the lower coil portion 125 accommodated in the lower receiving portion 115A is At least a portion of the conductive plate positioned at the bottom is exposed in the downward direction.
  • the upper coil part 121 and the lower coil part 125 each have a wide heat dissipation area with respect to at least one surface, whereby the core part 140 may be coupled into the ambient air or depending on the exposed surface position. When it can be quickly transferred to the core 140, it is advantageous for heat dissipation.
  • the middle accommodating part 113 may not be provided with an opening in the vertical direction except for the hollow TH. This is to secure the insulation distance between the middle coil portion 123 to be accommodated in the middle accommodation portion 113 and the primary coil portion to be wound around the upper connection portion 112 and the lower connection portion 114.
  • the conductive wire (not shown) constituting the primary coil part includes an outer surface of the upper connecting part 112 and a middle receiving part 113A and a lower receiving part in a space between the upper receiving part 111A and the middle receiving part 130. In the space between 115A, it may be wound along each of the outer surfaces of the lower connection portion 114.
  • 5 is an external perspective view of the lower core.
  • description is made based on the lower core 142 among the core parts 140, but assuming that the upper core 141 is symmetrical to the lower core 142, the description of the upper core 141 is replaced.
  • the lower surface of the lower core 142 includes a long side extending in one direction (eg, Y-axis direction) and a short side extending in another direction (eg, X-axis direction) intersecting one direction. It may have a rectangular planar shape.
  • the lower core 142 may include a lateral part 142_2 disposed on both sides facing each other around the midfoot 142_1 (or the center) having the track-like pillar shape and the midfoot 142_1.
  • the receiving hole defined as a track-like planar shape cut between the inner surface of the side portion 142_2 and the side surface of the midfoot 142_1 so that the lower core 142 may be combined in a form surrounding the bobbin 110 is a bobbin ( 110). Cores of this shape are also referred to as “EPC” cores.
  • the midfoot 142_1 may be inserted into the through hole TH of the bobbin 110.
  • the middle of the upper core 141 (not shown) and the middle of the lower core 142 (142_1) is spaced a predetermined distance (for example, 100um) gap (G) It can be shaped.
  • FIG. 6 shows a planar shape of two types of conductive plates according to an embodiment.
  • conductive plates 121 and 122 having two different planar shapes are illustrated.
  • the first type conductive plate 121 has the same shape except that the left and right sides of the second type conductive plate 122 are inverted, so that the first type conductive plate 121 will be mainly described.
  • the conductive plate 121 may have an open annular planar shape having two ends 121_M and 121_R to constitute one turn of the secondary coil portion.
  • the conductive plate 121, 122, 123, 124 in the present specification including FIG. 6 is shown as having an open track shape centered on the track-type hollow (HC), this is exemplary and the flat shape is an open circular/elliptical ring It may be a shape or an open polygonal ring shape.
  • the first type conductive plate 121 may have a “q”-shaped planar shape.
  • the second type conductive plate 122 may have a “p”-shaped planar shape because it is symmetrical to the first type conductive plate 121.
  • a through hole H may be provided at each end so that the fastening portion 130 can penetrate.
  • a through hole H having one rectangular plane shape per end is illustrated, but the number and location of the holes may be different.
  • Each of the upper coil part 120T, the first middle coil part 120M1, the second middle coil part 120M2, and the lower coil part 120B has one first type conductive plate 121 and one agent described above.
  • the two type conductive plates 122 may be configured to be stacked so as to be aligned in a vertical direction around the hollow HC.
  • the first end 121_M based on the first type conductive plate 121 may be referred to as a ground end because it is connected to the ground, and the second end 121_R may be referred to as a first signal end because it is connected by one signal line.
  • the second type conductive plate 122 may also have one ground end 122_M and one signal end 122_L, where the signal end 122_L is located in the opposite direction of the first signal end 121_R. And may be referred to as a second signal end.
  • two ground ends when two conductive plates are applied to one coil part constituting the secondary coil parts 120 and 130, for example, the upper coil part 120T, two ground ends, two first signal ends, and two A second signal end is provided.
  • the two ground ends may be aligned around the through hole H so that at least a portion overlaps each other in the vertical direction.
  • FIG. 7 is a side view for explaining an arrangement form between a gap and a conductive plate according to an embodiment. In FIG. 7, only the conductive plate 120 and the core portion 140 are illustrated for ease of understanding.
  • the secondary coil unit may be configured through a total of 8 conductive plates.
  • the first type conductive plate 121 and the second type conductive plate 122 may be stacked alternately in the vertical direction.
  • the upper two conductive plates may form one group to form the upper coil portion 120T
  • the four conductive plates of the middle may form another group to form the middle coil portions 120M1 and 120M2. It is possible to configure the lower two coil plates 120B by forming another group at the bottom.
  • the upper coil part 120T, the middle coil parts 120M1, 120M2, and the lower coil part 120B may be spaced apart from each other by a predetermined interval in the vertical direction.
  • the interval D2 between the upper coil part 120T and the first middle coil part 120M1 is greater than the height of the upper connection part 112 of the bobbin 110A
  • the second middle coil part 120M2 and the lower coil part The spacing D3 between 120B may be greater than the height of the lower connection portion 114.
  • D2 and D3 may be the same as or different from each other.
  • the sizes of D2 and D3 may be the same.
  • the distance D1 between the first middle coil part 120M1 and the second middle coil part 120M2 may be equal to or greater than the thickness T of the partition wall 116 of the bobbin 110A. Also, D1 may be smaller than D2 and D3. However, the distance D1 between the first middle coil part 120M1 and the second middle coil part 120M2 is between the middle 141_1 of the upper core 141 and the middle 142_1 of the lower core 142. It is preferable that it is larger than the vertical size of the gap G to be disposed.
  • each of the upper coil portion 120T, the first middle coil portion 120M1, the second middle coil portion 120M2, and the lower coil portion 120B is adjacent to the gap G
  • the 1st middle coil part 120M1 and the 2nd middle coil part 120M2 may have a side shape arrange
  • the gap G in the vertical direction is disposed between the first middle coil portion 120M1 and the second middle coil portion 120M2, and the gap G in the horizontal direction, the first middle coil portion 120M1 And the second middle coil part 120M2 do not overlap each other.
  • the distance between the first middle coil portion 120M1 and the gap G and the distance between the second middle coil portion 120M2 and the gap G in the vertical direction may be the same.
  • the first middle coil part 120M1 and the second middle coil part 120M2 are spaced apart from each other in the vertical direction around the gap G, so that the first middle coil part by the magnetic force energy biased in the gap G
  • the current density effect on the 120M1 and the second middle coil part 120M2 may be reduced. Therefore, when the first middle coil unit 120M1 and the second middle coil unit 120M2 overlap the gap G in the horizontal direction without being spaced apart in the vertical direction, the heat generation of the middle coil unit decreases. , The number of conductive plates to achieve the same performance can also be reduced.
  • the portion where the magnetic force energy is biased in the core portion 140 in addition to the gap G, the portion where the middle legs 141_1 and 142_2 are connected to the rest of the core portion 140 (that is, the upper portion of 141_1 and the lower portion of 142_2) ). Since this portion is closest to the conductive plate positioned at the outermost side in the vertical direction among the conductive plates, the current density may be increased even in the conductive plate. Therefore, it is also possible to reduce the current density change by increasing the thickness of the conductive plate than the remaining conductive plates and increasing the cross-sectional area. This will be described with reference to FIG. 8.
  • FIG. 8 is a side view showing an example of a transformer structure according to another aspect of an embodiment.
  • the thickness of the uppermost conductive plate 122 ′ and the lowermost conductive plate 121 ′ is greater than the thickness of the remaining conductive plates, compared to the transformer 100A according to an embodiment.
  • the structure of the bobbin 110B shown in FIG. 8 may be the same as the structure of the bobbin 110A shown in FIG. 4.
  • FIG. 9A shows the current density in the secondary coil portion of the transformer shown in FIG. 8
  • FIG. 9B shows the current density in the secondary coil portion of the transformer according to the comparative example.
  • FIG. 9A only the conductive plate and the core portion 140 of the transformer 100B shown in FIG. 8 are shown for ease of understanding.
  • FIG. 9B only the conductive plate and the core portion of the transformer 100' according to a comparative example are shown. It is shown.
  • the transformer 100' according to the comparative example overlaps the gap G and at least a portion in the horizontal direction without the middle coil portion 120M' being divided compared to the transformer 100B according to another embodiment.
  • the transformer 100' according to the comparative example has four conductive plates for the upper coil portion 120T' and the lower coil portion 120B', and the middle coil portion 120M' is for eight conductive plates. Each is configured, but it is assumed to have the same capacity as the transformer 100B according to another embodiment.
  • any conductive plate constituting the middle coil part does not overlap the gap G in the horizontal direction, and has a side shape spaced apart from each other in the vertical direction, thereby biasing the gap G
  • the influence of the magnetic force energy is not large, but in FIG. 9B, it can be seen that a high current density is formed around the middle of the core portion 140.
  • the magnetic force energy density of the portions 910 and 920 in which the midfoot of the core portion 140 is connected to the rest of the core portion 140 is high, in FIG. 9A, the outermost conductive plate in the vertical direction is larger than the remaining plates. It has a larger thickness, so there is less change in current density.
  • FIG. 9B it is understood that a high current density is formed in the upper coil part 120T' and the lower coil part 120B' adjacent to the parts 910 and 920 where the midfoot is connected to the rest of the core part 140. Can.
  • the transformer according to the embodiment has a corresponding performance compared to the transformer according to the comparative example, thereby reducing the loss of coils by reducing the current density of the conductive plate, thereby reducing the number of stacks. Accordingly, the height of the entire component of the transformer may be reduced, thereby reducing the length of the core path, which means an improvement in core loss. In addition, heat generation of the conductive plate may be reduced due to a decrease in current density.
  • FIG. 10 is an external perspective view of a transformer according to another embodiment
  • FIG. 11 is an exploded perspective view of a transformer according to another embodiment.
  • the transformer 100C according to another embodiment of the present invention includes a bobbin 110C, a plurality of conductive plates 120 inserted into the bobbin 110C, and a plurality of conductive plates 120 ) By electrically connecting the plurality of conductive plates 120 together with the plurality of fastening parts 130 and the bobbin 110 to form at least a part of the secondary coil part integrally coupled to the core part ( 140).
  • the transformer 100 is wound on the bobbin 110C, and may further include a conductive wire constituting the primary coil part, but illustration in the drawings of the specification is omitted.
  • the primary coil part (not shown) may be a rigid conductor metal, for example, multiple windings in which copper conductive wires are wound several times or may be plate-shaped.
  • the secondary coil units 120 and 130 may transform and output a power signal supplied from the first coil unit (not shown).
  • a total of eight conductive plates may be disposed in a stacked form in a thickness direction (eg, z-axis direction). Each conductive plate may correspond to 1 turn in the secondary coil portion. However, this is exemplary and more or less conductive plates may be applied.
  • each of the plurality of conductive plates 120 may be inserted into the bobbin 110C in a direction parallel to the x-axis.
  • Each of the plurality of conductive plates 120 may be electrically insulated from each other through an insulating material except for an electrical connection through the fastening portion 130.
  • an insulating film may be disposed between conductive plates adjacent to each other among the plurality of conductive plates to be electrically insulated from each other.
  • the insulating film may include components such as ketone and polyimide, but is not limited thereto.
  • the conductive plate 120 may include an upper coil portion 120T, a middle coil portion 120M, and a lower coil portion 120B, and each coil portion 120T, 120M, and 120B may be spaced apart from each other in the thickness direction. have.
  • each of the plurality of conductive plates 120 may include a conductive metal, for example, copper, but is not limited thereto.
  • the plurality of conductive plates may include aluminum.
  • the thickness of the conductive plate may be about 60% thicker than copper, but is not necessarily limited to this thickness ratio.
  • conductive wires (not shown) constituting the primary coil part, a plurality of conductive plates 120 constituting the secondary coil part, and the core parts 140 are insulated from each other, respectively 120 and 140 ) May have a shape suitable for accommodating or fixing at least a portion.
  • the bobbin 110C may have a through hole TH having a planar shape corresponding to the midfoot shape so that the midfoot of the core portion 140 can penetrate.
  • the bobbin 110C may include an insulating material, for example, a resin material, and may be produced in various molding methods.
  • the bobbin 110C according to the present exemplary embodiment may have an opening exposing the upper surface of the uppermost conductive plate in the thickness direction and the lower surface of the lowermost conductive plate in the thickness direction among the plurality of conductive plates 120, respectively. A more specific shape of the bobbin 110C will be described later with reference to FIG. 12.
  • the fastening portion 130 passes through one end of each of the conductive plates 120 in the form of a plurality of metal bars in the thickness direction (eg, Z-axis direction), and each of the conductive plates 120 is soldered. Can be fixed. Of course, depending on the embodiment, the metal bar may be replaced with other fastening members such as bolts, nuts, and washers.
  • the core portion 140 having the characteristics of a magnetic circuit may serve as a passage for magnetic flux.
  • the core portion may include an upper core 141 coupled from the upper side and a lower core 142 coupled from the lower side.
  • the two cores 141 and 142 may be symmetrical to each other and may be asymmetrical.
  • the core portion 140 may include a magnetic material, for example, iron or ferrite, but is not limited thereto. Since the specific shape of the core portion 140 is as described above with reference to FIG. 5, overlapping descriptions will be omitted.
  • FIG. 12 shows a shape of a bobbin 110C according to other embodiments.
  • the bobbin 110C includes an upper accommodating part 111C, a middle accommodating part 113C, a lower accommodating part 115C, an upper accommodating part 111C and a middle accommodating part.
  • the upper connecting portion 112C connecting the 113C and the lower connecting portion 114C connecting the middle receiving portion 113C and the lower receiving portion 115C may be included.
  • each of the receiving portions has a "U" shape or a track-shaped flat shape with one side semi-cut
  • each receiving portion (111C, 113C, 115C) and two connecting portions (112C, 114C) ) May be aligned around the through hole TH in a vertical direction on a plane.
  • the inner surface of each connection portion 112C and 114C may define a sidewall of the through hole TH.
  • the through hole TH may have a track-like planar shape, but this is exemplary, and it is sufficient to have a shape corresponding to the planar shape of the midfoot of the core portion 140 described above.
  • Each receiving portion (111C, 113C, 115C) has a receiving hole (RH1C, RH2C, RH3C) for accommodating the conductive plate 120, a conductive plate on the other side opposite to one side having a semi-circular shape on the XY plane in common 120) has an opening through which it can be inserted.
  • the upper accommodating part 111C has an upper accommodating hole RH1C in which the upper coil part 120T is accommodated
  • the lower accommodating part 115C is a lower accommodating hole RH3C in which the lower coil part 120B is accommodated.
  • the middle accommodating part 113C has a middle accommodating hole RH2C in which the middle coil part 120M is accommodated.
  • the upper receiving portion (111C) and the lower receiving portion (115C) has a symmetrical shape up and down in the thickness direction (for example, Z-axis direction), the upper receiving portion (111C) is opened to the upper side, the lower receiving portion ( 115C) opens downward. Therefore, at least a portion of the upper coil portion 120T accommodated in the upper receiving portion 111C is exposed in an upward direction of the conductive plate positioned at the uppermost end, and the lower coil portion 120B accommodated in the lower receiving portion 115C is At least a portion of the conductive plate positioned at the bottom is exposed in the downward direction.
  • the upper coil part 120T and the lower coil part 120B each have a wide heat dissipation area with respect to at least one surface, whereby the core part 140 may be coupled into the ambient air or depending on the exposed surface position. When it can be quickly transferred to the core 140, it is advantageous for heat dissipation.
  • the middle accommodating part 113C may not be provided with an opening in the vertical direction except for the hollow TH. This is to secure the insulation distance between the middle coil part 120M to be accommodated in the middle accommodating part 113C and the primary coil part to be wound around the upper connecting part 112C and the lower connecting part 114C.
  • the conductive wire (not shown) constituting the primary coil part receives the outer surface of the upper connection part 112 in the space between the upper accommodating part 111 and the middle accommodating part 130, and the middle accommodating part 113 and the lower accommodating part. In the space between the portions 115 may be wound along each of the outer surface of the lower connection portion (114).
  • the configuration of the plurality of conductive plates constituting the secondary coil portion is as described above with reference to FIG. 6, overlapping descriptions will be omitted.
  • the first-first conductive plate 121 and the second-first conductive plate 122 described with reference to FIG. 6 are divided based on a flat shape, but the conductive plate constituting the secondary coil part according to the embodiment ( 120) is also classified by each thickness. For example, similar to that shown in FIGS.
  • the conductive plate applied to the present embodiment includes a first-first conductive plate 121 having a first thickness in a vertical direction (eg, Z-axis direction), and 1 has the same planar shape as the conductive plate 121, but includes a 1-2 conductive plate 121' having a second thickness that is thicker than the first thickness.
  • the conductive plate applied to the embodiments of the present invention includes a 2-1 conductive plate 122 and a 2-1 conductive plate 122 having a first thickness in a vertical direction (eg, Z-axis direction).
  • a second planar conductive plate 122' having the same planar shape but having a second thickness that is thicker than the first thickness is further included.
  • Each of the upper coil portion 120T, the middle coil portion 120M, and the lower coil portion 120B is any one of the above-described first-type conductive plate 121 and first-type conductive plate 121'.
  • one of the 2-1 type conductive plate 122 and the 2-2 type conductive plate 122' is stacked in an alternating order so that at least one pair forms a vertical alignment around the hollow HC. Can be configured.
  • one of the two conductive plates in a pair may have a first thickness, and the other may have a second thickness, but is not limited thereto.
  • the conductive plate adjacent to the portion of the core portion 140 having a high magnetic force energy density in the vertical direction may have a second thickness.
  • FIG. 13 is a side view for explaining the arrangement form between the core portion and the conductive plate according to another embodiment. In FIG. 13, only the conductive plate 120 and the core portion 140 are illustrated for ease of understanding.
  • the secondary coil unit according to the embodiment may be configured through a total of eight conductive plates.
  • any one of the 1-1 type conductive plate 121 and the 1-2 type conductive plate 121' in the vertical direction, the 2-1 type conductive plate 122 and the 2-2 type conductive plate Any one of 122' may be stacked alternately.
  • the upper two conductive plates may form one group to constitute the upper coil part 120T, and the four conductive plates of the middle may form another group to form the middle coil part 120M, ,
  • the lower two conductive plates may form another group to configure the lower coil portion 120B.
  • the conductive plate adjacent to the portion where the magnetic force density is relatively biased in the core portion of each conductive plate may be thicker than the remaining conductive plates.
  • the portion where the magnetic force density is relatively biased in the core portion is a portion where the gap G and the middle feet 141_1 and 142_2 are connected to the rest of the core portion 140 (that is, the upper portion of 141_1 and 142_2) Lower part).
  • the two conductive plates in the center adjacent to the gap G or arranged to form a side shape in which at least a portion overlaps the gap G in the vertical direction are first-first having a second thickness.
  • 2 conductive plates 121' and 2-2 conductive plates 122' may be applied.
  • a conductive plate having a second thickness may be applied to the two conductive plates disposed in the outermost direction in the vertical direction.
  • a 2-2 conductive plate 122' having a second thickness is also applied to the uppermost conductive plate of the upper coil portion 120T, and a second thickness is also applied to the lowermost conductive plate of the lower coil portion 120T.
  • the 1-2 conductive plate 121' may be applied.
  • the thickness of the conductive plate adjacent to the portion where the gap G and the middle feet 141_1 and 142_2 are connected to the rest of the core portion 140 is larger than the remaining conductive plates.
  • the upper coil part 120T, the middle coil part 120M, and the lower coil part 120B may be spaced apart from each other by a predetermined interval in the vertical direction.
  • the interval D4 between the upper coil part 120T and the middle coil part 120M and the interval D2 between the middle coil part 120M and the lower coil part 120B may be the same or different.
  • the sizes of D4 and D5 may be the same.
  • FIG. 14 shows the current density in the secondary coil portion of the transformer shown in FIG. 13, and the comparative example is assumed to be the same as in FIG. 9B.
  • FIG. 14 only the conductive plate 120 and the core portion 140 of the transformer 100C according to an exemplary embodiment are shown similarly to FIG. 13 to help a simple understanding.
  • the transformer 100' according to the comparative example is the upper coil portion 120T' and the lower coil portion 120B' as compared to the transformer 100C according to another embodiment, respectively, with four conductive plates, and the middle coil portion ( 120M') is composed of 8 conductive plates, respectively, and each conductive plate has the same thickness and is assumed to have the same capacity as the transformer 100C according to another embodiment.
  • the two conductive plates 121 ′ and 122 ′ located at the center of the conductive plates constituting the middle coil portion 120M have a greater thickness than the other conductive plates, so the gap
  • the influence of the magnetic force energy biased to (G) is not large, it can be seen from FIG. 9B that a high current density is generally formed around the middle of the core portion 140.
  • the transformer according to the present embodiment has a corresponding performance compared to the transformer according to the comparative example, thereby reducing the loss of coils by reducing the current density of the conductive plate, thereby reducing the number of stacks. Accordingly, the height of the entire component of the transformer may be reduced, thereby reducing the length of the core path, which means an improvement in core loss. In addition, heat generation of the conductive plate may be reduced due to a decrease in current density.
  • a change in shape of a through hole disposed at the signal end of the conductive plate may be considered for higher efficiency. This will be described with reference to FIGS. 15 and 16.
  • FIG. 15 is a plan view showing an example of a transformer structure according to another embodiment
  • FIG. 16 is a perspective view showing an example of a configuration of a bobbin and a secondary coil part according to another embodiment.
  • the transformer 100D according to another embodiment has a similar structure to the stacking structure of the conductive plate and the spacing relationship in the vertical direction compared to the transformers 100A, 100B, and 100C according to the above-described embodiments.
  • the planar shapes of the first type conductive plate 123 and the second type conductive plate 124 constituting the conductive plate 120” are different.
  • the first type conductive plate 123 may correspond to the above-described first-type conductive plate 121 and the first-type conductive plate 121'.
  • the second type conductive plate 124 according to another embodiment may correspond to the aforementioned 2-1 type conductive plate 122 and the 2-2 type conductive plate 122'. Therefore, the first type conductive plate 123 and the second type conductive plate 124 according to another embodiment may each have a first thickness according to a stacking position in a vertical direction, and a second thicker than the first thickness. It may have a thickness.
  • each of the through hole H1 provided in the signal end 123_R of the first type conductive plate 123 and the through hole H2 provided in the signal end 124_L of the second type conductive plate 124 are respectively ,
  • the extension direction compared to the through hole H provided at the ground ends 123_M and 124_M may be tilted on a plane.
  • the extending direction of each of the through hole H1 provided in the signal end 123_R of the type 1 conductive plate 123 and the through hole H2 provided in the signal end 124_L of the second type conductive plate 124 Silver it is possible to achieve an obtuse angle ( ⁇ ) with the extending direction compared to the through hole (H) provided in the ground ends (123_M, 124_M).
  • ⁇ obtuse angle
  • the deviation along the extending direction of the distance (arrow) on the plane between the through hole H1 of one signal end 123_R and the portion constituting the turn in the corresponding conductive plate 123 Can be reduced.
  • the distance through which the current flows in each conductive plate is uniform, so that winding loss, eddy current loss, and leakage inductance are reduced. Therefore, the efficiency of the entire transformer can be improved.
  • the shape of the bobbin corresponds to the shape of the bobbin as shown in FIG. It can be transformed.
  • the bobbin 110D according to another embodiment has a chamfer part CF1 at two corners of the other side of a portion having a semicircular shape in a long axis direction (eg, an X-axis direction) on a plane. , CF2).
  • the transformer 100 may be mounted on an instrument transformer, an AC calculator, a DC-DC converter, a booster, a step-down transformer, and the like.
PCT/KR2020/001422 2019-01-30 2020-01-30 트랜스포머 WO2020159252A1 (ko)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080011857.7A CN113439315A (zh) 2019-01-30 2020-01-30 变压器
EP20747632.6A EP3920199A4 (de) 2019-01-30 2020-01-30 Transformator
US17/310,383 US20220093315A1 (en) 2019-01-30 2020-01-30 Transformer

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2019-0011882 2019-01-30
KR1020190011882A KR20200094422A (ko) 2019-01-30 2019-01-30 트랜스포머
KR1020190011883A KR20200094423A (ko) 2019-01-30 2019-01-30 트랜스포머
KR10-2019-0011883 2019-01-30

Publications (1)

Publication Number Publication Date
WO2020159252A1 true WO2020159252A1 (ko) 2020-08-06

Family

ID=71842282

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2020/001422 WO2020159252A1 (ko) 2019-01-30 2020-01-30 트랜스포머

Country Status (4)

Country Link
US (1) US20220093315A1 (de)
EP (1) EP3920199A4 (de)
CN (1) CN113439315A (de)
WO (1) WO2020159252A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7424103B2 (ja) * 2020-02-27 2024-01-30 Tdk株式会社 コイル部品

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100289607A1 (en) * 2009-05-15 2010-11-18 Delta Electronics, Inc. Transformer structure
US20110115598A1 (en) * 2009-11-19 2011-05-19 Delta Electronics, Inc. Bobbin structure and transformer having the same
EP2551860A1 (de) * 2010-03-25 2013-01-30 Panasonic Corporation Wandler
KR20160126141A (ko) * 2015-04-22 2016-11-02 엘에스산전 주식회사 보빈구조를 갖는 트랜스포머
KR20170087696A (ko) * 2016-01-21 2017-07-31 티디케이한국 주식회사 하이브리드 트랜스포머

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10148133A1 (de) * 2001-09-28 2003-04-24 Ascom Energy Systems Ag Bern Flachtransformator mit gesteckten Sekundärwicklungen
US8013709B2 (en) * 2008-04-18 2011-09-06 Delta Electronics, Inc. Conductive module and assembly structure having such conductive module
TWI347622B (en) * 2008-05-06 2011-08-21 Delta Electronics Inc Integrated magnetic device and conductive structure thereof
JP2013004887A (ja) * 2011-06-21 2013-01-07 Minebea Co Ltd コイル部品
DE102011116861A1 (de) * 2011-10-25 2013-04-25 Epcos Ag Elektronisches Bauelement zur Führung eines Magnetfeldes
US9378885B2 (en) * 2012-03-27 2016-06-28 Pulse Electronics, Inc. Flat coil windings, and inductive devices and electronics assemblies that utilize flat coil windings
CN104282422A (zh) * 2013-07-08 2015-01-14 康舒科技股份有限公司 高效率变压器
CN203690047U (zh) * 2013-12-17 2014-07-02 康舒科技股份有限公司 具有散热结构的变压器及运用该变压器的电源供应器
CN105826056B (zh) * 2015-01-22 2017-12-12 全汉企业股份有限公司 变压器
DE202015101501U1 (de) * 2015-03-25 2015-04-14 Chicony Power Technology Co., Ltd. Aufbau des Spulenkörpers eines Transformators
CN105140007A (zh) * 2015-10-13 2015-12-09 东莞市昱懋纳米科技有限公司 电源变压器
JP6724385B2 (ja) * 2016-01-22 2020-07-15 Tdk株式会社 コイル装置
US20210280366A1 (en) * 2018-06-22 2021-09-09 Lg Innotek Co., Ltd. Transformer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100289607A1 (en) * 2009-05-15 2010-11-18 Delta Electronics, Inc. Transformer structure
US20110115598A1 (en) * 2009-11-19 2011-05-19 Delta Electronics, Inc. Bobbin structure and transformer having the same
EP2551860A1 (de) * 2010-03-25 2013-01-30 Panasonic Corporation Wandler
KR20160126141A (ko) * 2015-04-22 2016-11-02 엘에스산전 주식회사 보빈구조를 갖는 트랜스포머
KR20170087696A (ko) * 2016-01-21 2017-07-31 티디케이한국 주식회사 하이브리드 트랜스포머

Also Published As

Publication number Publication date
EP3920199A1 (de) 2021-12-08
EP3920199A4 (de) 2022-11-23
CN113439315A (zh) 2021-09-24
US20220093315A1 (en) 2022-03-24

Similar Documents

Publication Publication Date Title
WO2016072779A1 (ko) 무선충전기용 송신장치
WO2020230960A1 (ko) 성능 개선을 위한 절연 구조가 적용된 평면 트랜스포머
WO2018056708A1 (ko) 다층 피시비 코어 구조를 가지는 교류 및 직류 누설전류 검출소자가 적용된 누전차단기
WO2020159252A1 (ko) 트랜스포머
WO2020204437A1 (ko) 평판형 변압기
US11799389B2 (en) Power module
WO2021154048A1 (ko) 트랜스포머 및 이를 포함하는 평판 디스플레이 장치
WO2019245233A1 (ko) 트랜스포머
WO2020138938A1 (ko) 변압기
WO2020242187A1 (ko) 평판형 변압기용 1차측 코일소자 및 평판형 변압기
US20180166203A1 (en) Circuit Board Assemblies Having Magnetic Components
WO2021054707A1 (ko) 평판 스피커용 가동 코일
KR20200094423A (ko) 트랜스포머
WO2024071554A1 (ko) 트랜스포머 및 이를 포함하는 디스플레이 장치
WO2022086220A1 (ko) 자성 소자 및 이를 포함하는 영상 출력 장치
WO2014178589A1 (ko) 자기에너지전달소자 및 전원장치
WO2021177801A1 (ko) 권선 코일 및 패턴 코일을 이용한 자성부품
WO2022169236A1 (ko) 인덕터 일체형 트랜스포머
WO2020040529A1 (ko) 변압기
WO2022131767A1 (ko) 전자부품 모듈 및 이를 포함하는 전원공급장치
WO2022203202A1 (ko) 절연형 컨버터용 외함 및 이를 이용한 절연형 컨버터
WO2020162682A1 (ko) 트랜스포머 및 이를 포함하는 직류 컨버터
WO2024076195A1 (ko) 트랜스포머 및 이를 이용한 전원 공급 장치
WO2022149835A1 (ko) 전자부품 모듈 및 이를 포함하는 전원공급장치
WO2023018067A1 (ko) 코일 부품

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20747632

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020747632

Country of ref document: EP

Effective date: 20210830